PART I—PRELIMINARY
Offences Against Administration of Justice
10. (1) A person who wilfully attempts in any manner to obstruct, pervert or defeat the course of justice of the ICC is guilty of an offence and liable on conviction to imprisonment for a term of not more than five years.
(2) Without limiting the generality of subsection (1), a person shall be deemed wilfully to attempt to obstruct, pervert or defeat the course of justice if, in any existing or proposed proceedings of the ICC, he—
(a) dissuades or attempts to dissuade a person by threats, bribes or other corrupt means from giving evidence; or
(b) accepts, obtains, agrees to accept or attempts to obtain a bribe or other corrupt consideration to abstain from giving evidence.
Offences against exercise of ICC jurisdiction
Corruptly influencing a witness, obstructing or interfering with the attendance or testimony of a witness, retaliating against a witness for giving testimony or destroying, tampering with or interfering with the collection of evidence
National penalties - offences against the administration of justice
EDIT.